I am replacing the porta potti on my boat with a real head. While thinking about installing the seacock/through hull for the head intake, the idea occured to me that it would be possible to T off the existing sink drain, and if I stoppedd the sink drain, I would still be able to create the suction needed to fill the head and thus avoid putting another hole in the hull. Actually I have decided not to do this, but it has me thinking and I wonder if the idea has been tried.

My S. African built boat has just that. It works, but there is also a valve on the sink drain ahead of the seacock because the suction needed for my Lavac head is too much for a sink plug. Basically, the sink is not useable without turning the valve each time. We don''t use the sink, but if we did, it would be a hassle. On the other hand, there is one less hole in the boat.

I suspect that with a large check valve on the sink, the head and sink could be used together.

Tempting to do because it would be so easy to install. I could give it a try for a season, and if it is really a hassle I could add the seacock the following season. Thanks for the reply. I feel better for not being too far out there with the idea.

I do that with my A/C inlet water. I installed a bronze ''T'' ball-valve after the thru-hull seacock. Since I would not run the engine and the A/C at the same time this works well. No reason you could not add a ''T'' valve above the sink shutoff.

Your idea has another advantage, I have my Catalina 30'' rigged this way. You can flush the head with sea water by plugging the sink, works fine. You can also flush with fresh water from the sink by closing the seacock, I do this most of the time. Advantage, no smell from the seawater sitting in the intake hose.

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register. Please enter your desired user name, your email address and other required details in the form below.Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:

Password

Please enter a password for your user account. Note that passwords are case-sensitive.

Password:

Confirm Password:

Email Address

Please enter a valid email address for yourself.

Email Address:

OR

Log-in

User Name

Password

Remember Me?

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.